DOT Highway Construction - Case study

Issues and Challenges:

• Excessive rainfall amounts
• Scheduling and project delays
• Sensitive nearby waters
• Stringent discharge requirements
• Groundwater flows

Approaches and Solutions:

Heavy sediment laden water threatened to breach the temporary retention basin sidewalls resulting in contamination of a nearby river. Liquid Biostar-CH was injected into the water as it was pumped from the basins. Weir tanks were employed to pre-settle the suspended solids prior to passing through a sand filtration system. Clean water was allowed to be discharged directly into the river.